Capturing moving Legong dancer

I took a life drawing workshop from a dutch artist, Noella Roos, who lives here in Bali. We worked large—3' x 4', on the floor, with charcoal. It was challenging for me because I never use charcoal and never work this large. The model continued to dance as we attempted to captured the initial "S" shape of her body—shoulders, spine and hips and then work from there. An afternoon of crawling around on the floor with charcoal—what a mess!